Update: I finally received the EEPROM chips, will do some tests with it this weekend.
Also, I'm changing the interface buttons design. Currently it uses a single Analog Input for the Up/Down/Left/Right/Play/Stop/Rec and one Digital Input for the Shift. But its not working correctly in some situations. So I'm adding another pair of C165 shift-registers and adding all buttons in parallel. Making it possible for future shortcuts such as up+down or left+right... also, it will leave 8 free button inputs for future usage or custom additions.
Wk